Abstract
In the field in south-central Sweden, we tested by randomised, standardised methodology the potential anti-tick repellent activity of two concentrations of MyggA® Natural spray (containing PMD) (4.2 and 3.2 g/m2) and one of RB86 (with 70% neem oil containing azadirachtin)(3 g/m2) to host seeking nymphs of Ixodes ricinus. Each substance was applied separately to 1 m2 cotton flannel cloths. Nymphal ticks on the cloths, pulled over the vegetation, were recorded at 10-m stops. Nymphal numbers recorded differed significantly between treated cloths [4.2 or 3.2 g MyggA® Natural spray/m2 and 3 g RB86/m2] and the untreated control (df = 3, χ2 = 112.74, P < 0.0001). Nymphal numbers also differed significantly among collectors (df = 3, χ2 = 15.80, P < 0.001). Repellency of treated cloths, i.e., 4.2 or 3.2 g MyggA® Natural spray/m2 and 3 g RB 86/m2 declined from day 0 (i.e. the day of impregnation) to day 3 after impregnation from 77 to 24%, 58 to 16% and 47 to 0.5%, respectively. This study suggests that all three treatments have significant repellent activities against I. ricinus nymphs.
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Acknowledgements
We are grateful to Emma and David Jaenson, and Mr. Thomas Larsson who assisted in the field work; Mr. Luc Gysen, Jaico Ltd., Belgium and Ms. Elisabeth Hammarberg, Nim Distribution Centre, Stockholm who provided MyggA Natural and RB86, respectively; Bioglan Pharma, Lund, Sweden, The Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas/SJFR), and The Swedish International Development Co-operation Agency (Sida/SAREC) for funding this work.
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Garboui, S., Jaenson, T.G.T. & Pålsson, K. Repellency of MyggA® Natural spray (para-menthane-3,8-diol) and RB86 (neem oil) against the tick Ixodes ricinus (Acari: Ixodidae) in the field in east-central Sweden . Exp Appl Acarol 40, 271–277 (2006). https://doi.org/10.1007/s10493-006-9031-4
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DOI: https://doi.org/10.1007/s10493-006-9031-4